When comparing Molokai vs Leuven, the Slant community recommends Molokai for most people. In the question“What are the best color themes for text editors?”Molokai is ranked 4th while Leuven is ranked 22nd.

Pros

Pro

Looks great

Pro

One of the most common dark themes

Default for Sublime Text, avaialble on IntelliJ products and Eclipse via plug-in. Usually ranked in top 3 of highest downloaded theme for a IDE.

Pro

Strong enough contrast

Without being fully black on white (which is good on modern already very contrasted screens) it remains pretty dark compared to many alternatives; making it more readable.

Pro

Easy to install with Vundle

Pro

Helpful for people with astigmatism

People with astigmatism prefer the bright white background since the extra light causes your pupils to contract, which makes your focus sharper.

Pro

Helpful for people with deuteranomaly

Leuven is a high-contrast theme preferring blue hues to red ones which makes it easier for people with deuteranomaly (most common form of red-green blindness) to distinguish different syntactical elements.

Cons

Con

That pink...

The pink color is too vibrant if compared with others. It pops out from context and may blend with red errors in some editors.